20975892

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{397}}^1$

素因数の和:465

約数の個数: 96

約数和(自身を含む): 60979968

約数和(自身を除く): 40004076

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 17, 21, 28, 34, 37, 42, 51, 68, 74, 84, 102, 111, 119, 148, 204, 222, 238, 259, 357, 397, 444, 476, 518, 629, 714, 777, 794, 1036, 1191, 1258, 1428, 1554, 1588, 1887, 2382, 2516, 2779, 3108, 3774, 4403, 4764, 5558, 6749, 7548, 8337, 8806, 11116, 13209, 13498, 14689, 16674, 17612, 20247, 26418, 26996, 29378, 33348, 40494, 44067, 47243, 52836, 58756, 80988, 88134, 94486, 102823, 141729, 176268, 188972, 205646, 249713, 283458, 308469, 411292, 499426, 566916, 616938, 749139, 998852, 1233876, 1498278, 1747991, 2996556, 3495982, 5243973, 6991964, 10487946, 20975892]

約数ペア:

[(1, 20975892), (2, 10487946), (3, 6991964), (4, 5243973), (6, 3495982), (7, 2996556), (12, 1747991), (14, 1498278), (17, 1233876), (21, 998852), (28, 749139), (34, 616938), (37, 566916), (42, 499426), (51, 411292), (68, 308469), (74, 283458), (84, 249713), (102, 205646), (111, 188972), (119, 176268), (148, 141729), (204, 102823), (222, 94486), (238, 88134), (259, 80988), (357, 58756), (397, 52836), (444, 47243), (476, 44067), (518, 40494), (629, 33348), (714, 29378), (777, 26996), (794, 26418), (1036, 20247), (1191, 17612), (1258, 16674), (1428, 14689), (1554, 13498), (1588, 13209), (1887, 11116), (2382, 8806), (2516, 8337), (2779, 7548), (3108, 6749), (3774, 5558), (4403, 4764)]